Now if it involves cleaning out a sewer line or locating a pipe leakage inside a wall or underneath flooring, that's when a you call in the licensed professional.  

Risk of leakage, breakage, humidity, etc...  

If you keep giving them 24 hour notices to enter to check on what the cause is for the electrical "leakage" or whatever, and they keep having to dismantle and relocate their little grow operation, they may just get rid of it or move it somewhere else.But, that's my guess.  

There's a lot of leakage in selling property thanks to the ridiculous fees.

You should have all your tenants sign some kind of forms saying if they don't report any  leakage tto you. 

Any rot or water leakage in the basement or 1st floor?

After all, I don't want any of the leakage spill into my side too.  

They also will shut the water off to the house once they are aware of the leakage.

After the inspection however, it was pointed out that the house needed a new roof ASAP, there was some leakage in the basement, and the framing was also pretty unsatisfactory which resulted in the house sort of concaving inwards a bit, but the inspector believes it may have just settled there and only came up as moderate concern on the report.

That's too much leakage for me to be happy with.